m68knommu: fix broken setting of irq_chip and handler

Fix compile error, by using correct loop variable:

arch/m68knommu/platform/68328/ints.c: In function ‘init_IRQ’:
arch/m68knommu/platform/68328/ints.c:182: error: ‘irq’ undeclared (first use in this function)
arch/m68knommu/platform/68328/ints.c:182: error: (Each undeclared identifier is reported only once
arch/m68knommu/platform/68328/ints.c:182: error: for each function it appears in.)

Signed-off-by: Greg Ungerer <[e-mail]>

arch/m68knommu/platform/68328/ints.c

···
 	IMR = ~0;
 
 	for (i = 0; (i < NR_IRQS); i++) {
-		set_irq_chip(irq, &intc_irq_chip);
-		set_irq_handler(irq, handle_level_irq);
+		set_irq_chip(i, &intc_irq_chip);
+		set_irq_handler(i, handle_level_irq);
 	}
 }